Feeding mechanism for sewing machines



March 26, 1935.

FEEDING MECHANISM FOR SEWING MACHINES C. FA RUBEL ET AL Filed May 9, 1953 3 Sheets-Sheet 1 March 26, 1935. c. F. Rulslil. vET AL 1,995,945y

FEEDINCT MECHANISM FOR SEWING MACHINES Filed May 9, 1933 3 Sheets-Sheet 2 mi l m Z5, um ZZ ai o@ im i d I@ 'mmm l March 26, 1935. c. F. RUBEL ET AL FEEDING MECHANISM FOR SEWING MACHINES Filed May 9, 1955 3 sheets-sheet 3 Patented Mar. 26, 1935.

mines L The invention relates to new .and usefulr` im.-

roperating mechanismeo'f the machine p provements in a'feedingv mechanism for sewing machines, and more particularly to va rfeeding mechanismy which clamps the work between feed vdogs for imparting `themovements thereto.

. An object of the invention is to providea feeding mechanism of the above type including an upper and a lower'feed dog, wherein the upper feed dogis mounted ona bar movable en'dwisein substantially a horizontal direction; andwherein said feed dog is raised and lowered by anoperating member located beneath the work support.

A further object of. the invention is to provideafeeding mechanism of the above type lwherein the upper feed dog is raisedandlowered by the same mechanism which imparts a'needle avoid.- ing movement to the looper. 4

A. still further. object ofthe invention `is-to provide a feedingmechanismof the; above type with which is associated a ypresser foot.carried.

by `a presserbar extendingv in `substantially la horizontal direction,` and wherein. said presser foot is raisedfromthe fabric during .the feeding thereof.l e e i l A still further object of the invention is to provide a feeding mechanism of thewabove type A wherein the` presser foot is raised and loweredby thesamel operating element which lowers and raises the upper feed dog. Y These and other. objects will in part Vbe obvious and Will .in part lbevhereinafter more ffully disclosed.y Y. l

l. In the drawings which show by `way of villusrtration one embodiment of the inventionf# Figure 1 is. a view'talen from' the Aendeofk the work support and showing .the feeding mechanism in side elevation,'parts rofthe machine being in section andA removed :sofas 'toshow thev Eig.`2 is ahorizontal sectional viewthrough the standard substantially'in the plane Vof the work support, fthej work support l andthe lower feed being omitted in order to show "more clearly the operating means 'forfth'e upper feed -.and presserfoot; e n'4 y j Fig. 3 isa view showing more or'less diagram;v matically the upper 'and the'lower feeding mech'- anisms, with the improved devices forimparting. .movements thereto,V the feed dogs being'A at the frontend of their feedingstroke';

. *m14 is a view similar tol Fig. abutshowing thefeedv dogs as having moved substantially to' the rear end of their feedingy stroke g1 I Fig. 5 isa view similar to Fig-3, but showing the feed dogs separatedthe'presser foot lowered, and

PATN

.thereed dogs-:about to return for their ii-ext feed? l .ingstrokeA andv t Fig". Sais a-se'ctional view on theline''6;6 of Figjg 1. Y

. In the'l present illustrated embodiment! of the fpli'ed to a sewing machine? which includesa supporting bedfl carrying-*a worksupport 2t# Extend-f ing upwardly fromV the bed 11. is a standard 3 ca'r rying spaced brackets 4 and '5 in wlichth'e main 5 invention, avefeedin'g mechanismv is shown as ap" actuating 'shaft 6 isqmountedfor rotation; This .n

main actuating shaft 6 extends infthgeneral i direction'f-of the line of feed and` isdisposed' in' a Vvertical'plane cutting the line of feed'at an'sacute angle.UY `Saidshaft is rotated by a beltfiivheelz '7i Theneedle bar l8 carrying yafneedle=9Fis1reciprof cated bymeans vof'a link IOWhichisfconnectdto a crank-on the forward end of the main actuating shaft 6 -Cooperating withth'eneedleQbeneaththe rk supportis ya Alooper- 11 mounted ori a louper car#V rier -12.f Saidlooperfcarrier l2 is oscillatedfor moving thezlooper into'and out of then'eedle'loop lby means of aunk Y13, wmen iirikgis conneetedftol a ball lstuttcarried' by an armllfmounted nfa vshaft 15',r The shaft'is oscillatedby 'meansfof an f eccentric lstrap 16, which Vcooperates eccentric onthe main" actuating shaft 6.

` The looper fis given a lateral or needle avoiding movement by an arm -17. "The arin517 carries'a ba-1l stud 18 towhich an eccentric strap 19 isconi n ected. This eccentric strap cooperates v'rithgfanv 'eccentriconthelmain'actuatingshaft 6.' v Y' The machiriethusldescribed"is ofthe typev shown, described and claimedA i in the patent- 'grante'd No'rrr'iar'i'y V.' Christensen and Frederick FfZer, March 25, 1930, NO. 1,751',508.fV

The feeding V'1 11e'rarlisni includes a lower feed dog 20` operatingthroug'h a slot 2l intheicloth plate? This -feedndQgQO i's rigidly Secured to a'fd bar 22. rheffeedbar-'injfwm islpivctedt la-'ft'ed rocker 23which is oscillated'bymeas' `of fan .eccentric'strap'24y connected to `a ball stud l25 ad? justable' `vnfa'.'i Slot' 26H1 ari` Yan-'2,7 formed integral with thelfeedrocker, The rocker is provided with spaced bearings at the upper end thereof, and the lsleevev 2 2d" at the-rear endof `VV the'- feed {baris' journaled "on avpin 23a carried-by `these kspaced with Ian y bearings. i' f Theeccentric strap 24 cooperates with an eccentric on rthe mainl shaft GJVIThe'feed bar isa-raised and' lowered for movingl the feed dog into and out.A of engagement with' th'e fabric `by 'an ec'' centric strap 28 which is pivotedat129 to the feed barl22 and which cooperates withVA the eccentric l f.

strap*on-themainactuatingshaft;Y i

WhileY the feed dog andpresserxfootfare shown as operated fromV the member formin'ga part o f the ,mechanism giving to the looper a needle avoiding movement, it vwillbe understood that any suitable operating part beneath the Work. support, properly timed, may be `usedzfor this'v purpose. While the -feedingmechanismisshown v as applied to a' `type of machine which is `especially adaptedfor stitching at the edge of "a fabric section. through the particular arrangement Y of the main actuating shaft, it will be understood bracket arm and said presserfbar. v

ythatiit,may be used in other types of sewingY machines .without departing .from the spirit. of tlie -invention as set forth in the appended claims. Havingthus described the invention, what We claim as new and desire to secure bylLetters-Pattenais-sv f -v 1. Affeeding mechanism for sewing machines Aincluding'in combination a work Supportga feed dog located above the Worksupport, a feedfba'r supporting said feed dog andy extending ins'ub stantiallya horizontal direction, a bracket mem# ber in which said feed bar is'mounted for ende Wise movement, means for moving the feed bar endwise in ysaid bracket'member, a presser foot,

ra; presser bar supporting the sameland extending `in ksubstantially a horizontal direction, and

means' for alternately raisingand lowering said 2. A feeding mechanism vforsewing machines includingin combination a worksupportya feed dog located above the work support, afeedfbar supporting said feed dog and extending in subf stantially a 'horizontal direction,- abracket mem'- ber in which said' feed bar is mounted for end.

Wise movement, meansfor moving the feed bar endwisein said bracket membena presser foot, a presser bar supporting the same and extending rin `substa'ntially'ahorizontal direction, allever pivoted"intermediatey its ends to said bracket 1 member, a link-connecting one end of said lever to said Vpresser bar, and-meansconnected to the otherend of said lever andjo'perating through Saidflever for alternately raising and lowering said bracket member and said presser bar.

3. Afeeding mechanism for sewing machines includingqin combination; v al Work support, a feed dog located abovethe work support, ay feed bar carrying said feed dog and` extendingin substantially a horizontal direction, apivoted bracket arm in which said feed-bar Vis mounted for endwise movement, means connected to said feed bar for rezkziprocatingv thel samev in kthe ,bracketv arm, a presser foot, a presser bar carrying said presser foot andrextending substantially in a horizontal, direction,fmeans for pivotally supporting said presser bar, a'leverpivotally mount?.

ed onv said-bracket arm, a linkjconnectingone endv of said'lever tothe presser-bar, andr means connected(4 to the other end of said lever and `operating` therethrough for alternately kraising Y and lowering said bracket member yand said presser bar.

4. A feeding mechanism for sewing machines including inv combination,v a work support, a feed dog located above the work supporta feed barv its bearings, a link connected to saidfcollarafor reciprocating said feed ban-afeedrocker to which' saidlink is connected, a presser! foot, a presser bar carrying said presser foot and extending in substantially'a horizontal direction, aleverpivot'- if ally mounted on saidbracket arm,` .a link rcon.-

necting one end of said Vlev'erto lsaid presser bar, and means connected to the other end of .said' lever and. operating therethrough 'for alternately f 5. 'A .feeding mechanism .for sewing machines Y including in combination a worksupport, a feed dog located above-the lWork support,` a feed fbar carrying said feed dogandV extending substan- .tially in a lfioriz'ontal,` direction,` a bracket arm having spaced bearing members inA whichl said feed bar is mounted for reciprocation, a collar at'- t'ached to the feed bar between said bearing members, saidl collar being provided with a lug having a sliding engagement with thejbracket arm for preventing the feed `bar from turning inl itsbear .ings,a;link connectedV to saidcollar for reciproQ- cating said feedbarga feed rockertowhich'said link is connected,l a presser foot, a presser/bar carrying said presser foot and extending in sub-Vv stantially a horizontal direction, a lever pivotally mounted on, said bracket arm, a link connecting one end'of said lever to said presser bar, means connected to the other end of said lever and oper ating therethrough for alternately raisingand lowering'said'bracket arm and said presser bar, a

feed dog located beneath the Work support, a feed' y `b'arjca'rrying said,v feed dog.. Saidfeedbarbeing connected to said feedrocker, and means for raising-and lowering said feedbar..

vfi. En a: sewing` machine, thev combination of a work support,.a needle,a looper-.cooperating with said needle and disposed-.beneaththe work support, means for moving thev lo'oper into and out ofthe needle loop, meansr for givingY said looper a needle avoiding movement, afeed dog located aboveY the work support,a feed bar carrying said feed dog and extending .substantially in f a horizontal direction, a bracket arm, ,bearings` carried by the bracket arm in whichsaid feed bar is mountedfor reciprocation, means connected to the feed bar between 'said bearings-for f reciprocating the same, a presser foot above the work support, a presser b-arfcarrying said` presser foot and extending` substantially in a horizontal direction, a lever pivotally supp'ortedjon said ,bracket arm, a link connecting vone end of said lever to said presserjbar, and a link yconnecting the other lend of said lever to the means for im-Y parting a needle avoiding movement to the looper and operating through said llever to alternately raise and lower the bracket arm and the'presser bar.

said needle and disposedbeneaththe work sup'-- 7. In a sewing machine, the combination of a'v work support, aneedle, alooper cooperatingwithport, means for moving the looper into and'out o f the needleloop, means for givingsaidvlooper"4 a needle avoiding movement, `a feed dog-located above the Work support, a feed bar carrying said feed dog and extending substantially in a horizontal direction,a bracket arm, bearings carried by the bracket arm in which said feed bar is mounted for reciprocation, means connected to the feed bar between said bearingsfor reciprocat-l ing the same, a presser foot above the WorkA support, a presser bar carrying said presser foot andV extending substantially in a horizontal direction;

alever pivotally supported Von said bracket arml l a linle' connecting vone-.end of!- said. lever to said presser ban, a ,link connecting the other endgof said; leverto the meanst for imparting a'. needle avoiding-',movement to theflooperr andfoperatingYV through. said lever to. alternately raise annif-lower thefbmcket arm andthe: presser'bar; a. feed dog Y. located. beneath' theA Work support, aA feed bar supportingtheasame, a Vfeed rockerto whichV said Y Y feed bar" is connected-and means for" oscillating theifeed rocker; said means for operatingthe feed bar carrying the feed dog located abovezrthefwork Y, support, being; connected; to said: feedro'cker.A

8i A sewingmaohine'including` in combination a: supporting base;` ai standard' carried thereby,

ai feed bar carrying said feed dog` and: extend,- ing substantially in a Y horizontalr direction, a

. rockerzlocated. beneath the. Worksuppont, said feed vrocken having a: slotted arm, an eccentric on Vthe,actuatii'ig shaft, an eccentric strap cooperating therewith ,andA connected to foot;v :eindfextem'l'ing substantially a: horizontal vdinercti'onrand pivotally mounted on'said stand.-`

a; lever pivoted to. said bracket `ar'm,. a. link connecting the lever to the presserfbarr alfiposcilzy lating; member located beneath the work support, a; link; connecting` saidv oscillatingrmembertov Said Y lever, an eccentric on. themain actuating shaft,

and anv eccentric strap cooperating therewith'. and

connectedldirectlyto said oscillating member Vfor oscillating'lthesame. y

VV9.2 A sewingmachinefincluding in combination Y a. supporting base, a standard carried-thereby,

a main: actuating shaftmount'ed onV said standard, and extendingin the general directionof the feed,- and. in a vertical' plane;cutting,v the lline "of l .,feed: atan acute angle, a `work support,V a. feed z Y dog located.VV above the Work` support', a feed? bar carrying saidv feed Vdog` and extending.' substan-v tiallyinr ahorizontal direction, abracket arm piv- 'otally mounted on said standard', beari'ngscarfk ried'by the bracket: arm in which said feed bar isf mounted for reciprocation, a feed rockerlocat'e'd beneath -the work. support,Y said `feed rockerv have, a. slotted', arm',V aneccentric member on Ythe,

actuating shaft, an eccentricy strapl cooperating Htherewith,and connected to saidslottedfarm, a

second slotted arm carried by the feed rocker,V a

'link connecting said arm to the feed bar for reciprocating the same, a presser foot,` a` presser bar carrying said presser'foot and extendingvsube nessus Araising and lowering'the same i I c, y v 1D.Y A feeding mechanismjfor'sewing including inL combination ,ai work support, .a-feed- 'material sammy,- m a. hormonas directies,[sindnieuwe mounted oni vsaid standard; a lever'pivoteditdsaid oscillating. member to: saidf lever,` ani eccentriuion bracket arm, alinlcV connecting the lever'v to the presserA bar, an oscillating membei locatedf 1 neath the work support, Va; linkconnecting said f Athe mainL actuating shaft, eccentriczstram co@- operating therewithl and connected; directly in" said A oscillating member vforA A oscillating;v the a feed dogylocatedl beneathgthe worlclsuppdli, f afeedban carrying thesame,` said" feed .baxtbel, Y' ing directly, connctedj to sa'id'feedmckenzisn eccentric strap on saidactuatingzshaftgagndan Y eccentric r'nemberV cooperating therewithamLidirectly connected to said last-named feedtbarlfor dog locatedabove Vthe@ work.",supportl,affe'dibai supporting'said feed. dog and extendingn-irdsui l, stantially ahorizontal direction, a bracket bracketzarm pivotallyt mounted on said" standf arm'bearings carried by theV bracket arminawhich. said-feed bar is mountedfor reciprocation, a: feed;

ber infwhich: the feed'bar is mounted'-l,fi;na:.-endy wise movement means for v'moving the feedfbai endwise in-jsaidbracket member, meansfor piu- *Y otally supporting said bracket membenmeans whereby said-bracket '.member, isi raised andglogwyeredvfor giving togsaid` feed dog fabric engaging` l means whereby said bracket member may fbe shiftedA for raising-the. feed bara-nd. feed dog .j A

the removal or insertionofeth'` v bodily to permit t 1-1. A1feeding,mechanismforfsevving-inaehin including inrcombination a work support, afeed dog vlocated above the work support, means for supporting said feedldog'gwherebyfsaid Afeeddog Y A .1.; may`V be `movedback and forthfandfraisedwandf V' Yi lowereda presser foot, a presser bar supporting saidpresser foot, said f geeddogsupportng means Y and saidpresser bar being mounted; foi: oscillant?VV ingv` movements about V'fixe'li lestes, Y and means: for

, oscillating saidfeed dog-supporting meansand said presser bar sov as to alternately bring-'the feed Idog and the 'presser foot Ainto contawtjwithgtheV material on the` Worksupport. n

V- 412; A- feeding mechanismfor. sewingzmachines I including in combination a Work support',.ja ,feed Y dog located above the `worlcsupporti;,.,xneans'for1 supporting said feed: dog wherebysaidi Ymay be movedzback andv forthand lraisedand lowered', a presser foot, a' presserfber supporting connecting: means Y for oscillatingfr said' feed i supporting meansH and said 'presser' bar so as yto foot into contact withfthe materialfon'thef support. "1 f CHARLES F. RUBEIL `valternately bringthe feed ,dog adffthe presserl GEoReEzsaUER- v 

